Oral-B iO Series 9 vs Oral-B iO Series 5
Compare features and trade-offs. Catalog scores are editorial assessments, not customer review averages or proof of hands-on testing.
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Higher catalog score: Oral-B iO Series 9 (Trust Score 9.0 vs 8.6)
9.0
Excellent
Best Overall
Pros
- +AI-guided coaching maps your brushing coverage in real time
- +Pressure sensor ring turns red before gum damage occurs
- +7 cleaning modes including whitening and sensitive
Cons
- −Premium price with replacement heads adding up annually
- −iO app requires Bluetooth connection to unlock AI features
Don't buy if
- ⚠ Replacement brush heads cost $10-15 each — factor this into long-term cost
8.6
Excellent
Best Value iO
Pros
- +AI position detection without the Series 9 price tag
- +Pressure sensor prevents gum damage
- +Universally compatible with all iO replacement heads
Cons
- −No wireless charging travel case
- −5 modes vs 7 on the Series 9
Don't buy if
- ⚠ The iO app requires Bluetooth — without it you lose the AI coaching benefit